Serial port to tcp/ip

Serial to Ethernet Connector 3.0
It is a software-based solution that allows you to share serial port devices over TCP/IP network turning your computer into low-cost terminal server. So, any serial port device connected to COM port could be accessed from anywhere in the world.

Network Serial Port Kit 5.8.4
Network Serial Port Kit allows you to connect any serial port devices over TCP/IP network or Internet. Program creates and connects up to 254 virtual serial ports at a time. Physical COM ports can be connected over the network as well.

PortMarshaller 1.2
PortMarshaller is a software-based TCP/IP port forwarder and network administration service. The software accepts connections on a particular TCP port, and establishes connections to a different TCP port to fulfill requests.